Combined guitar and keyboard
USD310090S · kind S · design
12Cited by
8References
1Claims
0Family size
Inventors
Key dates
| Filing date | Mar 11, 1987 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Aug 21, 2004 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.